Date: Wed, 25 Sep 2019 03:54:30 -0700 From: David Wolfskill <david@catwhisker.org> To: current@freebsd.org Cc: mav@freebsd.org Subject: "panic: sched_pickcpu: Failed to find a cpu" after r352636 -> r352671 Message-ID: <20190925105430.GW1108@albert.catwhisker.org>
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=2E..
SMP: AP CPU #3 Launched!
cpu3 AP:
ID: 0x00000003 VER: 0x01060015 LDR: 0x00000008 DFR: 0x00000000 x2API=
C: 1
lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000011ff
timer: 0x000100ef therm: 0x00010000 err: 0x000000f0 pmc: 0x00010400
cmci: 0x000100f2
SMP: AP CPU #6 Launched!
cpu6 AP:
ID: 0x00000006 VER: 0x01060015 LDR: 0x00000040 DFR: 0x00000000 x2API=
C: 1
lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000011ff
timer: 0x000100ef therm: 0x00010000 err: 0x000000f0 pmc: 0x00010400
cmci: 0x000100f2
panic: sched_pickcpu: Failed to find a cpu.
cpuid =3D 0
time =3D 1
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xffffffff82550=
830
vpanic() at vpanic+0x19d/frame 0xffffffff82550880
panic() at panic+0x43/frame 0xffffffff825508e0
sched_pickcpu() at sched_pickcpu+0x4c1/frame 0xffffffff82550990
sched_add() at sched_add+0x6e/frame 0xffffffff825509d0
gtaskqueue_start_threads() at gtaskqueue_start_threads+0x124/frame 0xffffff=
ff82550a70
taskqgroup_cpu_create() at taskqgroup_cpu_create+0x135/frame 0xffffffff8255=
0ab0
taskqgroup_adjust() at taskqgroup_adjust+0x1ad/frame 0xffffffff82550b20
mi_startup() at mi_startup+0x210/frame 0xffffffff82550b70
btext() at btext+0x2c
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at kdb_enter+0x3b: movq $0,kdb_why
db>=20
This is an Intel amd64 on a 4-core, 2 threads/core machine; I note
that src/sys/kern/sched_ule.c was modified in this update:
------------------------------------------------------------------------
r352658 | mav | 2019-09-24 13:01:20 -0700 (Tue, 24 Sep 2019) | 24 lines
Fix/improve interrupt threads scheduling.
=2E...
A copy of "dmesg.boot" from a verbose boot from yesterday for the
machine may be found at
http://www.catwhisker.org/~david/FreeBSD/history/freebeast.13_dmesg.txt
I'm about to find out if my laptop (which shares the above salient
characteristics, and is being updated in parallel) exhibits similar
symptoms.
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
"I am the Chosen One!" -- Donald Trump [Cf. Mt 24:23-24; Mk 13:21-23; Jn 5:=
31]
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
--kYoVsz7jWTVS7nyo
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